Lynde, Carleton John, b. 1872, Gilbert, A. C. (Alfred Carlton), 1884-1961, A.C. Gilbert Company · New Haven, CT : A.C. Gilbert Co. · leaf 22
FIG. 27DANCING POLLYWOGS forces the nozzle in the other direction. 20 BOY ENGINEERING … Air may escape from the pollywog when it is turning a som-ersault ; if so, water will take its place, and may make the polly-wog too heavy to float. You can restore its buoyancy by sucking out the water. Experiment 14. Adancing pollywog. Make a pollywogas in Experiment 12,but bend its tailtwice as…
Glass blowing and working
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